Refrigeration & Air Conditioning Mechanic Red Seal · Question
Before commencing the evacuation process on a newly installed split-system heat pump, what is the crucial final step that must be completed to ensure effective moisture and non-condensable removal?
For effective evacuation, it is critical that all system service valves (suction and liquid line) remain closed to isolate the system from refrigerant and atmos
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Question: Before commencing the evacuation process on a newly installed split-system heat pump, what is the crucial final step that must be completed to ensure effective moisture and non-condensable removal?
Answer options:
- Opening the liquid line service valve.
- Pressurizing the system with refrigerant.
- Installing a high-capacity filter drier. ✅ Ensuring all service valves are closed, except for the manifold connection points.
Correct answer: Ensuring all service valves are closed, except for the manifold connection points.
Explanation: For effective evacuation, it is critical that all system service valves (suction and liquid line) remain closed to isolate the system from refrigerant and atmosphere, except for the manifold gauge set connections, which allows the vacuum pump to pull a deep vacuum.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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